Answer:
144°
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° × (n - 2) ← n is the number of sides
Here n = 8 ( octagon ), hence
sum = 180° × 6 = 1080°
let the measure of 1 congruent angle be x
Then sum the 8 angles and equate to 1080
100 + 120 + 140 + 5x = 1080
360 + 5x = 1080 ( subtract 360 from both sides )
5x = 720 ( divide both sides by 5 )
x = 144
Thus each of the 5 congruent angles is 144°
 
        
             
        
        
        
Answer:
3m+m^2
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
(3,3)
Step-by-step explanation:
x + y - 6= 0 
x- y = 0
Add the two equations together
x + y - 6= 0 
x- y = 0
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2x - 6 = 0
Add 6 to each side
2x-6+6 = 0
2x = 6
Divide by 2
2x/2 = 6/2
x = 3
Now find y
x-y = 0
3 - y = 0
y = 3
 
        
                    
             
        
        
        
Answer:
4x2 and 8 divided by 4 
Step-by-step explanation:
I love math !